112 ECONOMICAL GEOLOGY, 



Analysis. 



Water 13.914 



Sand 1-962 



Lime 10.264 



Potash and soda 5.874 



Phosphoric acid '..;.. 10.155 



Organic matter, and salts not estimated 57-831 



100.000 



Ammonia in 100 parts 14.793 



This analysis was made by the same method which 

 was pursued in analj'zing the cancerine. If we calculate 

 its value according to the principles given in the preceding 

 page, it will be to the cancerine as 17.33 to 11.43 ; or 

 when guano is worth $60 a ton, cancerine is worth $39.57. 



Not having its ammonia ready formed, the cancerine 

 may not be quite as quick in its action as guano; but in 

 turn it is neither volatile nor soluble, and so not liable to 

 loss from exposure to air and water; and it appears to be 

 more lasting in its effects. 



The amount of the material (cancerine) which can be 

 produced annually is not yet known. There is so little 

 knowledge of the habits of the king crab, that no judgment 

 can be formed as to the effect that will be produced on a 

 coming year's supply by the destruction of great numbers 

 of those which come to the shores to lay their eggs. If 

 the number is not materially diminished, the manufacture 

 could be extended so as to produce many thousand tons 

 every year. 



Fish for Manure. — The ocean and Delaware Bay, adja- 

 cent to this county, as well as the bays and sounds in the 

 salt-marshes, contain immense quantities of fish, which 



